Heating furnace



April 12, 1927. 1,624,763

H. C. RYDING ET AL HEATING FURNACE Filed April 9, 1926 I5 Sheets-Sheet l awuwntow April 12, 1927.

- 1,624,763 H. c. RYDINNG 5T 51.

HEATING FURNACE Filed April 9. 1926 s She ets-Sheet 2 H." c. RYDING ET AL April 12, 1927.

HEATING FURNACE Filed April 9. 1926 s Sheets-Sheet 5 (FAI IRFIIAI La q Patented Apr. 12, 1927.

.UlllTED STATES PATENT" OFFICE.

HERBERT (Z RYDING AND ARTHUR B. HASWELL, OF BIRMINGHAM, ALABAMA.

HEATING Application filed A ril 9,

Fig. 2 is a horizontal section thereof on.

the line 22 of Fig. 1; v

Fig. 3 isa vertical transverse section on line 33'of Fig. 1.

Referring in detail to the drawings, the furnace consists of side walls 10 and 12, end

walls 11 and 13 and aroof 14 all formed of suitable refractory material. The furnace proper is supported by a frame work comprising uprights 16 and 18 on opposite sides which are tied together by suitable cross beams 20 and cross bracing 22. An outer shell 24 made of steel plates or the like is supported by the frame work and to this is secured cast iron supporting brackets 26 having inwardly extending, flanges 28 which carry the furnace walls.

The fixed part of the furnace is open at the bottom from end to end and a novel form of hearth is provided. The arrangement is such that the work to be treated is placed on the hearth at one end and carried through the entire len 11 of the furnace without being disturbe and is discharged at the opposite end thereof.

This hearth comprises a series of conveyor flights 30 which are secured at their outer ends to chains 32 and 34 which latter are trained around suitable sprockets 36 and 38 carried by the shafts 40 and 42. The shaft 42 also carries a sprocket 44 which is con nected by means of chain 46 to a-shaft 48 whichis driven through suitable reduction gearing enclosed in the housing member 50 by a variable speed motor 52. The flights 30 collectively constitute a travelling hearth. Each flight is formed with a depressed center as indicated at 54 and they are also provided with guide portions in the form of grooves 56 and 58 on the outer and inner sides, respectively. The flights may be of cast iron, cast steel or various other metal alloys. Or-they may be made of suitable refractory material or of suitable metal cov- FURNACE.

1926. Serial ltd 100,851. &

ered or impregnated with a refractory materlal.

Water cooled supporting skids 60 are adapted to support the upper run of the hearth in a. substantial] horizontal plane.

These water cooled skids are carried by cross members 62 which at their ends rest on filler blocks 64 carried by longitudinally extending channels 66 secured to the furnace frame members. The water cooled skids 6O relieve the chains of the weight of the flights andthe weight of the work carried by the hearth and by their coaction with the grooves -58 also prevents any appreciable amount of lateral displacement of the hearth. The lower run of the hearth is supported by a series of idler wheels 68 carried on suitable cross shafts 70. These idler wheels as shown in Fig. 3 are curved in cross-section and spaced so as to register with the curved grooves 56 formed in the flights. Located between certain of the idlers are provided,

emergency skids 72 which are adapted to form a support for the lower run of the conveyor in the event of damage to the idlers. These supports also serve to support the lower run of the hearth while assembling the same.

The furnace is heated by means of a series of oppositely disposed burners 74 and 76 which are supplied with high pressure gas or other suitable fuel from the mains 78 and 80.. Flues 82 and 84 located on opposite sides of the furnace are provided for the escape of the spent ases.-

hearth, at the'left side in Figs. 1 and 2. The drive is such that the hearth is driven in In operation artic es 'wto be heated ln' 1 the furnace are placed on the traveling the direction of the arrow X. This carries 9;;

thework through the furnace at a rate of speed determined by the setting of the controller for the variable speed motor 52. The length of the furnace is such that the time of treatment within the furnace is readily varied to suit different requirements. The sprockets. which support the right end of the hearth are located beyond the end of the furnace proper. As the work reaches this end of the hearth it is droppedv over the end of the same onto a discharge chute 86.

Thoughwe have described quite specifically the embodiment of the inventionillustrated, it is not to be construed that we are limited thereto since various modifications may be made by those skilled in the art with- I out departing from the invention as defined in the appended claims.

vWhat wejclaim is:-

1. A heating furnace-having an endless travelling hearth comprising spaced. chains v 'havin' cross flights secured thereto, and

coole means for {supporting said flights -in dependently ofsaid chains,

2. A heating furnace having anendlesstravelling hearth comprising spaced chainshaving cross flights, secured thereto, 1 said flights having guide portions to prevent lat-v eral displacement thereof and members coacting with said portions for supporting said flights.

supporting depressed travelling hearth comprising spaced chains having cross flights secured thereto, said flights having grooved portions and guide members coacting with said grooves to prevent lateral displacement of the flights.

4'. A heating furnace having an endless,

. :HERBERT 0., B-YD'ING.

ARTHUR B. HASWELL.

3, A heating furnace having an endless 

